A stringent upper limit of the PH3 abundance at the cloud top of Venus T. Encrenaz, T. K. Greathouse, E. Marcq, T. Widemann, B. Bézard, T. Fouchet, R. Giles, H. Sagawa, J. Greaves and C. Sousa-Silva A&A, 643 (2020) L5 Published online: 27 October 2020 DOI: 10.1051/0004-6361/202039559